Alert archive / Illinois / Tornado Warnings in 2025

Tornado Warning 6, NWS Quad Cities, IA

April 20, 2025Henry County, Mercer County, Illinois

NWS Quad Cities, IA issued this tornado warning at Apr 20, 2025, 8:36 PM CDT for Henry County, Mercer County, Illinois. It was in force for 39 min. 8 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Apr 20, 2025, 8:36 PM CDT (01:36 UTC)
Expired: Apr 20, 2025, 9:15 PM CDT
In force: 39 min
Issued by: NWS Quad Cities, IA
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

Counties Henry County, IL, Mercer County, IL

The radar

The Quad Cities radar (KDVN), 34 km from the middle of the area, began a volume at 01:36 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

What was reported inside it

Time	Report	Where	Remark
Apr 20, 8:36 PM CDT	TSTM WND DMG	2 N New Windsor, IL	Spotter has an anemometer reading of 65 MPH with a 4 inch tree limb down.
Apr 20, 8:36 PM CDT	TSTM WND DMG	2 N New Windsor, IL	Spotter has an anemometer reading of 65 MPH with a 4 inch tree limb down.
Apr 20, 8:54 PM CDT	TORNADO	4 Ese Ophiem, IL	EFU with at least a 1/4 mile path was depicted by radar and a scour mark in a freshly plowed field. Corn debris was also found in the fence at this location.
Apr 20, 8:58 PM CDT	TORNADO	4 E Morristown, IL	A tornadic debris signature was seen on the KDVN Doppler Radar up to 2,900 ft. Corn stubble and leaves were found along the beginning of the path. As the tornado approached the Hennepin Canal, tree damage was found with snapped hardwood trees and other branche
Apr 20, 8:58 PM CDT	TORNADO	4 Sse Osborn, IL	A brief tornado caused damage to trees. EF0 with 80 MPH max winds.
Apr 20, 9:09 PM CDT	TSTM WND DMG	4 Sse Osborn, IL	Trees down over train tracks. Probable tornado damage.
Apr 20, 9:09 PM CDT	TSTM WND DMG	4 Sse Osborn, IL	Trees down over train tracks. Probable tornado damage.
Apr 20, 9:10 PM CDT	TORNADO	2 Ese Osborn, IL	Tornado sighted crossing Wolf Road. Trees snapped and over the road, power lines down.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

Did it verify

Verified. The Iowa Environmental Mesonet's Cow matched 4 storm reports to this tornado warning; the first came 18 minutes after it went out.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Apr 20, 3:41 PM CDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

Davenport, (KDVN), launched 00:00Z, 1.6 hours before the alert went out and 31 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 716 m above ground
0-6 km bulk shear: 63 kt
0-1 km storm-relative helicity: 628 m²/s²
0-3 km storm-relative helicity: 711 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.4

Open this sounding in Storm Lab

The text

As transmitted.

704 
WFUS53 KDVN 210136
TORDVN
ILC073-131-210215-
/O.NEW.KDVN.TO.W.0006.250421T0136Z-250421T0215Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Quad Cities IA/IL
836 PM CDT Sun Apr 20 2025

The National Weather Service in the Quad Cities has issued a

* Tornado Warning for...
  Northeastern Mercer County in northwestern Illinois...
  Western Henry County in northwestern Illinois...

* Until 915 PM CDT.

* At 836 PM CDT, a severe thunderstorm capable of producing a tornado
  was located over Ophiem, or 13 miles west of Cambridge, moving
  northeast at 40 mph.

  HAZARD...Tornado.

  SOURCE...Radar indicated rotation.

  IMPACT...Flying debris will be dangerous to those caught without 
           shelter. Mobile homes will be damaged or destroyed. 
           Damage to roofs, windows, and vehicles will occur.  Tree 
           damage is likely.

* This dangerous storm will be near...
  Sunny Hill, Osco, Lynn Center, Orion, Swedona, Ophiem, and Andover 
  around 840 PM CDT.
  Colona, Morristown, and Warner around 845 PM CDT.
  Cleveland, Green River, and Dayton around 850 PM CDT.
  Osborn and Geneseo around 855 PM CDT.

Other locations in the path of this tornadic thunderstorm include
Shady Beach.

This includes the following highways...
 Interstate 80 in Illinois between mile markers 6 and 26.
 Interstate 74 in Illinois between mile markers 11 and 32.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 4115 9036 4115 9042 4121 9053 4133 9046
      4133 9043 4137 9043 4151 9035 4152 9024
      4154 9021 4154 9019 4158 9018 4158 9014
      4142 9002
TIME...MOT...LOC 0136Z 209DEG 35KT 4125 9043 

TORNADO...RADAR INDICATED
MAX HAIL SIZE...<.75 IN

$$

Gibbs

3 follow-up statements

717 
WWUS53 KDVN 210148
SVSDVN

Severe Weather Statement
National Weather Service Quad Cities IA/IL
848 PM CDT Sun Apr 20 2025

ILC131-210158-
/O.CAN.KDVN.TO.W.0006.000000T0000Z-250421T0215Z/
Mercer IL-
848 PM CDT Sun Apr 20 2025

...THE TORNADO WARNING FOR NORTHEASTERN MERCER COUNTY IS CANCELLED...

The tornadic thunderstorm which prompted the warning has moved out 
of the warned area. Therefore, the warning has been cancelled.

A Tornado Watch remains in effect until 1100 PM CDT for northwestern
Illinois.

&&

LAT...LON 4120 9030 4125 9033 4135 9042 4137 9043
      4151 9035 4152 9024 4154 9021 4154 9019
      4158 9018 4158 9014 4142 9002
TIME...MOT...LOC 0148Z 209DEG 35KT 4136 9035 

$$

ILC073-210215-
/O.CON.KDVN.TO.W.0006.000000T0000Z-250421T0215Z/
Henry IL-
848 PM CDT Sun Apr 20 2025

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 915 PM CDT FOR WESTERN
HENRY COUNTY...

At 848 PM CDT, a severe thunderstorm capable of producing a tornado
was located over Orion, or 9 miles northwest of Cambridge, moving
northeast at 40 mph.

HAZARD...Tornado.

SOURCE...Radar indicated rotation.

IMPACT...Flying debris will be dangerous to those caught without 
         shelter. Mobile homes will be damaged or destroyed. Damage 
         to roofs, windows, and vehicles will occur.  Tree damage is 
         likely.

This dangerous storm will be near...
  Colona, Morristown, Osborn, Cleveland, Geneseo, Green River, 
  Dayton, and Warner around 855 PM CDT.

Other locations in the path of this tornadic thunderstorm include
Shady Beach.

This includes the following highways...
 Interstate 80 in Illinois between mile markers 6 and 26.
 Interstate 74 in Illinois between mile markers 11 and 27.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 4120 9030 4125 9033 4135 9042 4137 9043
      4151 9035 4152 9024 4154 9021 4154 9019
      4158 9018 4158 9014 4142 9002
TIME...MOT...LOC 0148Z 209DEG 35KT 4136 9035 

TORNADO...RADAR INDICATED
MAX HAIL SIZE...<.75 IN

$$

Gibbs

498 
WWUS53 KDVN 210202
SVSDVN

Severe Weather Statement
National Weather Service Quad Cities IA/IL
902 PM CDT Sun Apr 20 2025

ILC073-210215-
/O.CON.KDVN.TO.W.0006.000000T0000Z-250421T0215Z/
Henry IL-
902 PM CDT Sun Apr 20 2025

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 915 PM CDT FOR WESTERN
HENRY COUNTY...

At 901 PM CDT, a confirmed tornado was located over Osborn, or 8
miles east of East Moline, moving northeast at 40 mph.

HAZARD...Damaging tornado.

SOURCE...Radar confirmed tornado.

IMPACT...Flying debris will be dangerous to those caught without 
         shelter. Mobile homes will be damaged or destroyed. Damage 
         to roofs, windows, and vehicles will occur.  Tree damage is 
         likely.

This tornado will be near...
  Shady Beach, Osborn, Cleveland, and Geneseo around 905 PM CDT.

This includes the following highways...
 Interstate 80 in Illinois between mile markers 6 and 26.
 Interstate 74 in Illinois between mile markers 11 and 27.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

To repeat, a tornado is on the ground. TAKE COVER NOW! Move to a
basement or an interior room on the lowest floor of a sturdy
building. Avoid windows. If you are outdoors, in a mobile home, or in
a vehicle, move to the closest substantial shelter and protect
yourself from flying debris.

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 4120 9030 4125 9033 4135 9042 4137 9043
      4151 9035 4152 9024 4154 9021 4154 9019
      4158 9018 4158 9014 4142 9002
TIME...MOT...LOC 0201Z 209DEG 35KT 4148 9026 

TORNADO...OBSERVED
MAX HAIL SIZE...<.75 IN

$$

Gibbs

977 
WWUS53 KDVN 210204
SVSDVN

Severe Weather Statement
National Weather Service Quad Cities IA/IL
904 PM CDT Sun Apr 20 2025

ILC073-210215-
/O.CON.KDVN.TO.W.0006.000000T0000Z-250421T0215Z/
Henry IL-
904 PM CDT Sun Apr 20 2025

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 915 PM CDT FOR
NORTHWESTERN HENRY COUNTY...

At 904 PM CDT, a confirmed tornado was located over Osborn, or 9
miles east of East Moline, moving northeast at 40 mph.

HAZARD...Damaging tornado.

SOURCE...Radar confirmed tornado.

IMPACT...Flying debris will be dangerous to those caught without 
         shelter. Mobile homes will be damaged or destroyed. Damage 
         to roofs, windows, and vehicles will occur.  Tree damage is 
         likely.

This tornado will be near...
  Shady Beach around 910 PM CDT.

This includes the following highways...
 Interstate 80 in Illinois between mile markers 6 and 26.
 Interstate 74 in Illinois between mile markers 11 and 15.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

To repeat, a tornado is on the ground. TAKE COVER NOW! Move to a
basement or an interior room on the lowest floor of a sturdy
building. Avoid windows. If you are outdoors, in a mobile home, or in
a vehicle, move to the closest substantial shelter and protect
yourself from flying debris.

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 4133 9013 4136 9020 4142 9033 4145 9039
      4151 9035 4152 9024 4154 9021 4154 9019
      4158 9018 4158 9014 4142 9002
TIME...MOT...LOC 0204Z 212DEG 34KT 4148 9024 

TORNADO...OBSERVED
MAX HAIL SIZE...<.75 IN

$$

Gibbs

What forecasters said that day

The local office's own words before this tornado warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Quad Cities, IA wrote its last area forecast discussion before this tornado warning went out at Apr 20, 6:36 PM CDT, 2 hours earlier. Its key messages:

A strong storm system will impact the area today and tonight bringing widespread rainfall and possibly a few severe storms south of I-80.
There is an Enhanced Risk for severe storms across portions of NE Missouri with a Slight Risk extending northward just south of the I-80 corridor. Damaging winds, large hail, and isolated tornadoes are possible with the strongest storms.
Localized flash flooding is possible mainly west of the Mississippi River, where WPC has a Slight Risk for excessive rainfall. Isolated areas that get hit by several rounds of storms could receive 3"+ of rainfall.
Temperature warming into the 70s this upcoming week with periodic chances for showers and storms.

Area forecast discussion, Apr 20, 6:36 PM CDT, 2 hours before

Area Forecast Discussion
National Weather Service Quad Cities IA IL
636 PM CDT Sun Apr 20 2025

.KEY MESSAGES...

- A strong storm system will impact the area today and tonight
  bringing widespread rainfall and possibly a few severe storms
  south of I-80.

- There is an Enhanced Risk for severe storms across portions of
  NE Missouri with a Slight Risk extending northward just south
  of the I-80 corridor. Damaging winds, large hail, and
  isolated tornadoes are possible with the strongest storms.

- Localized flash flooding is possible mainly west of the
  Mississippi River, where WPC has a Slight Risk for excessive
  rainfall. Isolated areas that get hit by several rounds of
  storms could receive 3"+ of rainfall.

- Temperature warming into the 70s this upcoming week with
  periodic chances for showers and storms.

&&

.SHORT TERM /THROUGH TONIGHT/...
Issued at 115 PM CDT Sun Apr 20 2025

GOES water vapor imagery shows a potent upper low over north-
central Oklahoma with new convective development occurring
downstream beneath a mid-level dry slot. This area of convection
is intensify across eastern Oklahoma and southeast Kansas, and
heading into southwest Missouri. SPC mesoanalysis had a 1008mb
surface low positioned over northern Oklahoma with an effective
warm front stretching across central Missouri, marked by a jump
in temperatures to the mid 70s and notable clearing on visible
satellite imagery.

The upper wave and associated surface low will continue to lift
to the NNE into this evening, eventually pulling the warm
sector into southern portions of the forecast area. Widespread
cloud cover may limit instability to a certain extent; however,
surface temperatures and dewpoints reaching the mid/upper 60s
and upper 50s/low 60s should yield MLCAPE between 500-1000 J/kg
south of I-80 by the late afternoon and evening. Strong forcing
for ascent associated with the low and convergence along the
cold front will lead to widespread moderate to heavy rainfall.
CAMs continue to show an organized QLCS moving into our
southwest counties between 3 - 6 PM, then tracking to the NNE
toward the Mississippi River between 5 - 9 PM, gradually
weakening with time.

HREF mean 2-5 km updraft helicity values are highest generally
along and south of Highway 34 where embedded, or even a few
discrete supercells are most probable. The high shear
environment with 0-3 km bulk values between 35-45 kts are
supportive of QLCS mesovortices, which could lead to a few
narrow corridors of damaging winds and potentially a few
tornadoes across the southern outlook area. Additionally, any
sustained semi-discrete cells could pose a large hail risk.
Another concern due to repeated rounds of storms and heavy
rainfall is for isolated areas to receive 3"+ of total rainfall,
which could lead to localized flash flooding. The area most at
risk for this appears to be west of the Mississippi River and
south of Highway 30.

SPC Outlook: The Enhanced Risk has been shifted northward to
include portions of northeast Missouri, and the Slight Risk
remains in place just south of the I-80 corridor. Damaging
winds, large hail, and a few tornadoes are possible with the
strongest cells late this afternoon and into early tonight.

&&

.LONG TERM /MONDAY THROUGH SUNDAY/...
Issued at 115 PM CDT Sun Apr 20 2025

Monday through Saturday: the pattern remains somewhat active
despite zonal flow aloft. Periodic shortwaves will translate
through the region, which could spark off some additional
showers and storms, but exact timing and location details remain
uncertain this far out. Temperatures are expected to gradually
warm up into the 70s for much of this time-frame, cooling into
the 60s on Saturday.

&&

.AVIATION /00Z TAFS THROUGH 00Z MONDAY/...
Issued at 636 PM CDT Sun Apr 20 2025

An area of low pressure over north-central Missouri will
continue to lift northeastward towards our region this evening,
bringing widespread showers and thunderstorms. MVFR/IFR ceilings
and visibilities are likely, with perhaps some brief LIFR
conditions possible with the stronger storms. Some of these
storms could be strong to severe, mainly for BRL, with damaging
winds being the main threat. As the low passes through late this
evening into the overnight hours, winds are expected to shift
dramatically, ultimately becoming west-northwesterly and
remaining gusty. Once the showers and storms diminishes, IFR
ceilings will gradually improve throughout the day Monday.

&&

.DVN WATCHES/WARNINGS/ADVISORIES...
IA...None.
IL...None.
MO...None.

&&

SHORT TERM...Uttech
LONG TERM...Haase/Uttech
AVIATION...Schultz

Hazardous weather outlook, Apr 20, 2:07 PM CDT, 6 hours 29 minutes before

Hazardous Weather Outlook
National Weather Service Quad Cities IA IL
207 PM CDT Sun Apr 20 2025

IAZ040>042-051>054-063>068-076>078-087>089-098-099-ILZ001-002-007-
009-015>018-024>026-034-035-MOZ009-010-211915-
Buchanan-Delaware-Dubuque-Benton-Linn-Jones-Jackson-Iowa-Johnson-
Cedar-Clinton-Muscatine-Scott-Keokuk-Washington-Louisa-Jefferson-
Henry IA-Des Moines-Van Buren-Lee-Jo Daviess-Stephenson-Carroll-
Whiteside-Rock Island-Henry IL-Bureau-Putnam-Mercer-Henderson-
Warren-Hancock-McDonough-Scotland-Clark-
207 PM CDT Sun Apr 20 2025

This Hazardous Weather Outlook is for portions of north central
Illinois...northwest Illinois...west central Illinois...east
central Iowa...northeast Iowa...southeast Iowa and northeast
Missouri.

.DAY ONE...THIS AFTERNOON AND TONIGHT

A strong storm system is expected to bring widespread rain and a
few thunderstorms to the outlook area today into this evening.
Heavy rainfall and a few severe storms are possible, with the main
threats damaging wind and large hail, especially this evening. A
few tornadoes are also possible mainly south of Highway 34.

The Storm Prediction Center has an Enhanced Risk (Level 3 of 5)
across portions of northeast Missouri, a Slight Risk extending to
the north just south of the Interstate 80 corridor, and a Marginal
Risk up to the Highway 30 corridor.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

GENERAL STORM MOTION OF THE DAY:

Toward the northeast at 40 to 45 mph.

Haase/Uttech

In the hours before

Local storm report, Apr 20, 8:21 PM CDT, 15 minutes before

Preliminary Local Storm Report
National Weather Service Quad Cities IA IL
821 PM CDT Sun Apr 20 2025

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0714 PM     Tornado          1 SSE Beaverdale        40.83N 91.21W
04/20/2025                   Des Moines         IA   Emergency Mngr

            DOT metal building/shed collapsed.

&&

ERVIN

Local storm report, Apr 20, 8:22 PM CDT, 14 minutes before

Preliminary Local Storm Report
National Weather Service Quad Cities IA IL
822 PM CDT Sun Apr 20 2025

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0714 PM     Tstm Wnd Dmg     1 SSE Beaverdale        40.84N 91.21W
04/20/2025                   Des Moines         IA   Emergency Mngr

            Tree reported blown down.

&&

ERVIN

Local storm report, Apr 20, 8:23 PM CDT, 13 minutes before

Preliminary Local Storm Report
National Weather Service Quad Cities IA IL
823 PM CDT Sun Apr 20 2025

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0746 PM     Tstm Wnd Dmg     1 N Macomb              40.47N 90.68W
04/20/2025                   McDonough          IL   Trained Spotter

            Large tree blown down over roof of house
            with siding damage.

&&

JTS

Local storm report, Apr 20, 8:25 PM CDT, 11 minutes before

Preliminary Local Storm Report
National Weather Service Quad Cities IA IL
825 PM CDT Sun Apr 20 2025

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0750 PM     Tstm Wnd Dmg     3 SE Macomb             40.44N 90.65W
04/20/2025                   McDonough          IL   Trained Spotter

            Several shingles lost from roof of house.
            Time estimated by radar.

&&

JTS

Local storm report, Apr 20, 8:27 PM CDT, 9 minutes before

Preliminary Local Storm Report
National Weather Service Quad Cities IA IL
827 PM CDT Sun Apr 20 2025

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0809 PM     Rain             Shellsburg              42.09N 91.87W
04/20/2025  M1.19 Inch       Benton             IA   Public

            Total rainfall so far.

&&

JTS

Local storm report, Apr 20, 8:31 PM CDT, 5 minutes before

Preliminary Local Storm Report
National Weather Service Quad Cities IA IL
831 PM CDT Sun Apr 20 2025

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0800 PM     Rain             3 W Cedar Rapids        41.97N 91.73W
04/20/2025  M2.40 Inch       Linn               IA   Trained Spotter

&&

ERVIN

The office that day

Everything else NWS Quad Cities, IA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 20, 7:00 PM CDT	Severe Thunderstorm Warning	DVN	Hancock, McDonough	60 min
Apr 20, 7:14 PM CDT	Severe Thunderstorm Warning	DVN	Henderson, Mercer, Warren	61 min
Apr 20, 7:25 PM CDT	Severe Thunderstorm Warning	DVN	Mercer, Rock Island	65 min
Apr 20, 7:33 PM CDT	Severe Thunderstorm Warning	DVN	Hancock, Henderson, McDonough, Warren	42 min
Apr 20, 7:33 PM CDT	Tornado Warning	DVN	Henderson, Mercer	42 min
Apr 20, 7:37 PM CDT	Tornado Warning	DVN	Hancock, Henderson, McDonough, Warren	23 min
Apr 20, 7:55 PM CDT	Severe Thunderstorm Warning	DVN	McDonough, Mercer, Warren	65 min
Apr 20, 7:57 PM CDT	Tornado Warning	DVN	Warren	23 min
Apr 20, 8:00 PM CDT	Tornado Warning	DVN	Mercer, Rock Island	32 min
Apr 20, 8:08 PM CDT	Severe Thunderstorm Warning	DVN	Rock Island	67 min
Apr 20, 8:31 PM CDT	Severe Thunderstorm Warning	DVN	Henry	59 min
Apr 20, 8:52 PM CDT	Tornado Warning	DVN	Henry	34 min
Apr 20, 9:06 PM CDT	Tornado Warning Tornado observed	DVN	Henry, Rock Island, Whiteside	24 min
Apr 20, 9:14 PM CDT	Tornado Warning	DVN	Bureau, Henry, Whiteside	31 min

Nearby

Tornado Warnings in Illinois, 2025 Every tornado warning in 2025 Tornadoes in 2025

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.